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/*
* Copyright (c) 2013-2014 - Andre Roth <neolynx@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation version 2.1 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*
*/
#include <libdvbv5/atsc_eit.h>
#include <libdvbv5/descriptors.h>
#include <libdvbv5/dvb-fe.h>
#if __GNUC__ >= 9
#pragma GCC diagnostic ignored "-Waddress-of-packed-member"
#endif
ssize_t atsc_table_eit_init(struct dvb_v5_fe_parms *parms, const uint8_t *buf,
ssize_t buflen, struct atsc_table_eit **table)
{
const uint8_t *p = buf, *endbuf = buf + buflen;
struct atsc_table_eit *eit;
struct atsc_table_eit_event **head;
size_t size;
int i = 0;
size = offsetof(struct atsc_table_eit, event);
if (p + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - p, size);
return -1;
}
if (buf[0] != ATSC_TABLE_EIT) {
dvb_logerr("%s: invalid marker 0x%02x, should be 0x%02x",
__func__, buf[0], ATSC_TABLE_EIT);
return -2;
}
if (!*table) {
*table = calloc(sizeof(struct atsc_table_eit), 1);
if (!*table) {
dvb_logerr("%s: out of memory", __func__);
return -3;
}
}
eit = *table;
memcpy(eit, p, size);
p += size;
dvb_table_header_init(&eit->header);
/* find end of curent list */
head = &eit->event;
while (*head != NULL)
head = &(*head)->next;
while (i++ < eit->events && p < endbuf) {
struct atsc_table_eit_event *event;
union atsc_table_eit_desc_length dl;
size = offsetof(struct atsc_table_eit_event, descriptor);
if (p + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - p, size);
return -4;
}
event = (struct atsc_table_eit_event *) malloc(sizeof(struct atsc_table_eit_event));
if (!event) {
dvb_logerr("%s: out of memory", __func__);
return -5;
}
memcpy(event, p, size);
p += size;
bswap16(event->bitfield);
bswap32(event->start_time);
bswap32(event->bitfield2);
event->descriptor = NULL;
event->next = NULL;
atsc_time(event->start_time, &event->start);
event->source_id = eit->header.id;
*head = event;
head = &(*head)->next;
size = event->title_length - 1;
if (p + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - p, size);
return -6;
}
/* TODO: parse title */
p += size;
/* get the descriptors for each program */
size = sizeof(union atsc_table_eit_desc_length);
if (p + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - p, size);
return -7;
}
memcpy(&dl, p, size);
p += size;
bswap16(dl.bitfield);
size = dl.desc_length;
if (p + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - p, size);
return -8;
}
if (dvb_desc_parse(parms, p, size,
&event->descriptor) != 0 ) {
return -9;
}
p += size;
}
return p - buf;
}
void atsc_table_eit_free(struct atsc_table_eit *eit)
{
struct atsc_table_eit_event *event = eit->event;
while (event) {
struct atsc_table_eit_event *tmp = event;
dvb_desc_free((struct dvb_desc **) &event->descriptor);
event = event->next;
free(tmp);
}
free(eit);
}
void atsc_table_eit_print(struct dvb_v5_fe_parms *parms, struct atsc_table_eit *eit)
{
dvb_loginfo("EIT");
ATSC_TABLE_HEADER_PRINT(parms, eit);
const struct atsc_table_eit_event *event = eit->event;
uint16_t events = 0;
while (event) {
char start[255];
strftime(start, sizeof(start), "%F %T", &event->start);
dvb_loginfo("|- event %7d", event->event_id);
dvb_loginfo("| Source %d", event->source_id);
dvb_loginfo("| Starttime %d", event->start_time);
dvb_loginfo("| Start %s UTC", start);
dvb_loginfo("| Duration %dh %dm %ds", event->duration / 3600, (event->duration % 3600) / 60, event->duration % 60);
dvb_loginfo("| ETM %d", event->etm);
dvb_loginfo("| title length %d", event->title_length);
dvb_desc_print(parms, event->descriptor);
event = event->next;
events++;
}
dvb_loginfo("|_ %d events", events);
}
void atsc_time(const uint32_t start_time, struct tm *tm)
{
tm->tm_sec = 0;
tm->tm_min = 0;
tm->tm_hour = 0;
tm->tm_mday = 6;
tm->tm_mon = 0;
tm->tm_year = 80;
tm->tm_isdst = -1;
tm->tm_wday = 0;
tm->tm_yday = 0;
mktime(tm);
tm->tm_sec += start_time;
mktime(tm);
}
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